What is true of an object that is in free fall?

No forces are acting on it.

The forces of thrust and gravity balance one another.

The forces of air resistance and gravity balance one another.

Only the force of gravity is accelerating it.

The suns energy is most useful to humans after it is converted to

An alarm clock ringing is an example of a: A) involuntary muscle B) response C) neuron

For water to travel across the cell membrane at a substantial rate, the water molecules travel through protein channels known as aquaporins.

Which group of air pollutants tend to cool the atmosphere because they reflect more sunlight back to space thus reducing incoming solar radiation? A. CFCs. B. ozone enhancers. C. nitrous oxides. D. atmospheric aerosols.

What is it called when you add warmer water to a body of water

1pt Blood is made up of A. nutrients, minerals, fats, and proteins B. oxygen, carbon dioxide, and sugar C. plasma, red blood cells, white blood cells, and platelets D. bone marrow cells and water

One of the first breakthroughs in biotechnology was the discovery of the gene that makes insulin. Part of this process involved scientists making DNA to match each possible sequence of insulin mRNA. What was the next step of this process? A.

Which of these modes of transmission require a bodily opening either natural or artificial?

Which factor is a characteristic of an acid? A. Non-corrosive B. Soapy C. Sour D. Slippery

How are unique daughter cells created in meiosis? A. Homologous pairing B. Crossing over C. Mutation during reduction Division D. Zygote fertilization